wyupdate.exe and update of service

using "wyupdate.exe" I can run in two different phases download and update?

I'm not quite sure what you're asking. Can you describe what you want (give me an example)?

This command: "wyUpdate.exe /fromservice" download my package and upgrade my service. Is there a command that downloads only?

ThanksMike

Is there a command that downloads only?

Not yet, sorry.